#! /bin/sh
# grep: 用于查找文件里符合条件的字符串
# http://www.runoob.com/linux/linux-comm-grep.html

grep --help
grep -V
    # grep --version
grep -c     # print only a count of matching lines from file
grep -i     # 忽略大小写(单字符)
grep --color    # 匹配的字符用颜色标记
grep -n     # 打印行号
grep -R     # 搜索整个子目录

